Study on fatigue and energy-dissipation properties of nanolayered Cu/Nb thin films

Y.-C. Wang, T. Höchbauer, J.G. Swadener, T. Darling, A. Misra, R. Hoagland, M. Nastasi

Research output: Chapter in Book/Published conference outputConference publication

Abstract

Energy dissipation and fatigue properties of nano-layered thin films are less well studied than bulk properties. Existing experimental methods for studying energy dissipation properties, typically using magnetic interaction as a driving force at different frequencies and a laser-based deformation measurement system, are difficult to apply to two-dimensional materials. We propose a novel experimental method to perform dynamic testing on thin-film materials by driving a cantilever specimen at its fixed end with a bimorph piezoelectric actuator and monitoring the displacements of the specimen and the actuator with a fibre-optic system. Upon vibration, the specimen is greatly affected by its inertia, and behaves as a cantilever beam under base excitation in translation. At resonance, this method resembles the vibrating reed method conventionally used in the viscoelasticity community. The loss tangent is obtained from both the width of a resonance peak and a free-decay process. As for fatigue measurement, we implement a control algorithm into LabView to maintain maximum displacement of the specimen during the course of the experiment. The fatigue S-N curves are obtained.
Original languageEnglish
Title of host publicationHigh performance structures and materials III
EditorsC.A. Brebbia
PublisherWIT Press
Pages323-330
Number of pages8
Volume85
ISBN (Electronic)978-1-84564-225-9
ISBN (Print)978-1-84564-162-7
DOIs
Publication statusPublished - 2006
Event3rd international conference on High Performance Structures and Materials - Ostend, Belgium
Duration: 3 May 20065 May 2006

Publication series

NameWIT transactions on the built environment
PublisherWIT Press
Volume85
ISSN (Print)1746-4498
ISSN (Electronic)1743-3509

Conference

Conference3rd international conference on High Performance Structures and Materials
Abbreviated titleHPSM'06
CountryBelgium
CityOstend
Period3/05/065/05/06

Bibliographical note

© 2006 WIT Press. This publication is freely available on the publisher's website.

Keywords

  • nanolayered thin films
  • fatigue
  • loss tangent

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